GB172591A - Improvements in or relating to clocks, watches, and like instruments - Google Patents
Improvements in or relating to clocks, watches, and like instrumentsInfo
- Publication number
- GB172591A GB172591A GB2870421A GB2870421A GB172591A GB 172591 A GB172591 A GB 172591A GB 2870421 A GB2870421 A GB 2870421A GB 2870421 A GB2870421 A GB 2870421A GB 172591 A GB172591 A GB 172591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dial
- spring
- ring
- movable
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/20—Indicating by numbered bands, drums, discs, or sheets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission Devices (AREA)
Abstract
172,591. Jackson, W. J. Mellersh-, (Soc. Anon d'Horlogerie et Bijouterie de Geneve). June 29, 1920. Dials.-In clocks, watches, &c. of the type in which a movable dial is arranged to rotate intermittingly in one direction beneath a fixed masking dial by means of a force which is stored up during the time the movable dial is stationary, the movable dial is mounted concentric with the fixed dial and is periodically operated by means of a cylinder escapement and a spring tension device. Fig. 2 shows a movable dial of the ring type having teeth on the inner side which teeth are arranged in two series y, z at different levels and adapted to pass through slots g<1>, g<2>, Fig. 3, of a cylinder escapement g as it is rotated through gearing from the cannon pinion 5. This pinion also drives a gear e", Fig. 5, to which is attached one end of a spring f<2>, the other end being attached to a roller d having pins d<8> which engage with the teeth of the ring dial. While the ring dial is held stationary by the cylinder escapement, the roller d is held and the spring f<2> is tensioned causing, when the ring dial is released, the roller d to move the dial with a jerk. In a modification, the spring is mounted between the cannon pinion and a concentric gear. A central disc dial may be provided which may show the hours from 1 to 12 through a second aperture in the masking-dial. The apparatus may, instead of showing the hours &c., show the dates, months, &c., or phases of the moon &c.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2870421A GB172591A (en) | 1920-06-29 | 1920-06-29 | Improvements in or relating to clocks, watches, and like instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2870421A GB172591A (en) | 1920-06-29 | 1920-06-29 | Improvements in or relating to clocks, watches, and like instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB172591A true GB172591A (en) | 1921-11-29 |
Family
ID=10279765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2870421A Expired GB172591A (en) | 1920-06-29 | 1920-06-29 | Improvements in or relating to clocks, watches, and like instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB172591A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3427799A (en) * | 1966-02-22 | 1969-02-18 | Ebauches Sa | Spring-loaded instantaneous date indicator stepper and indexer |
US3704583A (en) * | 1971-02-05 | 1972-12-05 | Suisse Pour L Ind Horlogere Sa | Date indicating mechanism for watches |
-
1920
- 1920-06-29 GB GB2870421A patent/GB172591A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3427799A (en) * | 1966-02-22 | 1969-02-18 | Ebauches Sa | Spring-loaded instantaneous date indicator stepper and indexer |
US3704583A (en) * | 1971-02-05 | 1972-12-05 | Suisse Pour L Ind Horlogere Sa | Date indicating mechanism for watches |
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